Turret tool post



March 30, 1948. LA. R. oBERWEGNx-:R 2,438,644

TURRET TOOL POS T Filed Aug. 18, 1943 2 Sheets-Sheet l f2! www ls March 30, 1948'.

A. ROBERWEGNER 2,438,644

TURRET TooL PosT Filed Aug. 18, 1943 2 sheets-'sheet 2 lBY Patented Mar. 30, 1948 hasta UNITED STATES PATENT OFFICE TURRET TOOL POST i Alfred R. Oberwegner, Los Angeles, Calif. Application August 18, 1943, Serial No. 499,098

6 Claims.

My present invention relates to a tool holding means, and more particularly toa turret tool holding means which may be -applied to and used on a lathe, or oth'er cutting machine, for performing various operations.

One of the principal objects of this inventionl is to provide .a turret tool-holding means for holding a plurality of cutting or other tools on a conventional lathe carriage, or corresponding part of other conventional machine, whereby the various tools on the tool-holding means may be readily shifted into position for use, and a tool h'olding means of this class in which the individual tools may be quickly adjusted, and in which the tools may be held tightly in position with 'a minimum of mechanism, apparatus, and elort.

Another important object of this invention is to provide a tool holding means in which the out` ting, or other operating tool, may not be accidentally or readily shifted in a lateral directionv or undesired position during the cutting or other operation.

Another important object of this invention is to provide simple means for tightly holding cutting or other tools of different sizes, such as cutting tools of varying cross-sections.

An important object also of this invention is to provide a tool holding means of this class in which a stop may be secured in `any .desired position so that a cutting tool may be readily removed from the tool holding means, vand sharpened or adjusted, and replaced to its original position without the expenditure of unnecessary time to make adjustments.

A further important object of this invention is to provide a turret or turn table on a support in which the locating or indexing means consists of a plurality of radiating rollers for accurately indexing the former with respect to the latter, for obtaining greater accuracy, and without any appreciable wear on the members, .and means in connection therewith for resiliently h'olding the tools in their shifted positions and for causing the shifted positions of the tool holding means to be determined by a substantial snapping of the means into such positions.

Another important object of this invention is to provide a tool holder of this class which' may be used effectively for holding either small or relatively large boring bars.

Also an important object of this invention is to provide a novel means in connection with a tool holder of this class for vertically adju-sting the boring bar or other tool held by the tool holding means.

A still further Aobject of this invention is to provide novel and simple means of anchoring the tool post against turning on the saddle of the lathe or similar tool supporting carriage,- and j such means which may be easily shifted into posi- I tion for use or out of the Way.

With these and other objects in view, as'will appear hereinafter, I have devised a turret tool post having certain novel features of construction, combination, and arrangements of parts and portions, as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to `the characters of reference thereon which form a which:

- Fig. 1` is a `fragmentary plan-view of th'e tool carriage showin-g my tool holding means in one form, mounted thereon, portions being shown broken away and in section, the broken away and sectional portions being l-I of Fig. 2;

Fig. 2 is a partial sectional and partial elevational view thereof, ywith taken at 2-2 of Fig. 1;

Fig. 3 is a sectional yelevational view thereof, taken substantially through 3 3 of Fig. 1;

taken approximately at Fig. 4 is a fragmentary plan view, similar to that shown inFig, 1,' but showing a boring bar held, bythe holding means and also showing a protective collar at the upper portion of the holding means, shifted to a. slight angular position to expose means for vertically adjusting the tools;

Fig. 5 is a fragmentary sectional view thereof in plan,itaken through 5-,5 of Fig. 6;

Fig. 6 is an elevational view of the tool holder showing thesame holding a boring bar and also showing in section the means for vertically adjusting thel boring bar or other tool, the sectional portion being shown as taken through 6-6 of Fig. 5; and

Fig. 7 is-a plan view of a slightly modified form of construction of my tool holding means.

The numeral I designates the saddle of a tool supporting and adjusting carriage, whichis normally provided on lathes, Shapers, and the like.

This carriage usually is provided with a T-slot,

designated la, for receiving'a T-bolt whereby the tool post or other tool holding means is secured to the carriage.

The essential tool supporting elements of my tool holding means consist of a base or support carried on or by the base. The support Il has a disc-shaped base portion part of this application, in

the section and viewk 2,438,844 3 4 I I, which rests upon the carriage I', and a cylin- A, B, C, and D, for performing various operations drical column or post IIb, extending upwardly on the work on the particular machine, are from and -coaxial with respect to the base. The mounted on the tool holder between the flange support II is secured to the carriage by the T- members l2a and I2b, and more specically on bolts I3, the headY of which is located in the T- the upper face of the flange member I'Za. The

slot Ia. The shank I3a of the bolt extends coaxilatter flange member is provided in its upper ally through the column IIb, and is provided at face with a plurality of rocker grooves I2h which its upper threaded end with a nut I3b which bears are located pear the Vcorners pf the flange memagainst the ripper. and? Qi the .,cQl.u 1,ri);xholding` ber 4.12m., 'miese grooves are arranged substanthe device=in-position onthe saddle. V-l0 tiallyrtangentially"with respect to a circle con- The tool holder I2 is made in the form of a I `centric with the pivotal axis of the tool supportspool and consists of a lower flange member Iza", 4ing holder. The long side of each groove Vis Y an upper flange member |21, and a tubular?apaiser-fV "ffspadedinwardly from one edge of the lower flange I2. The intermediate portion of this spacer is member andthe end ofthe particular groove is of square cross-section and the-endsfarehreduced; 15ilspa'c'ed 4'frein-mtime :adjacent edge of the flange said ends extending into holespin gtlleflmg'- llllmhelf @Shownbest in'Fig. 1. The bottom and are peened over, securing ther several mem#- of the groove is arcuate, as shown best in Fig. 2. bers I2a, I2", and I2c rigidly together.:KV Knef Eaclifthese grooves is adapted toV receive atoolflange members I2a and.,; lj2b, are centrally located supporting wedge 2l, which is adapted to rock bythe cirlindriaalfcelumn.sIlIP-zvihickrmteniisiasimathe-amorefsoithataits upper-or' toolsupport-V allyf'hraush thefsnaer: runeenfsirle lower flange recruter:12%11 fsealsmeyded W asasfishowngbestfin l' thereby raising or lowering ,the.cuttingnose.-ef- Y g -miie-.igmgzerportionorj faceof therocker Atooly tcolz ,holder-I2 isfcirumierentiallyqnosiesupporting wedge. has a longitudinal fchannelf tionedfor indexed-yvitlnrespectite@.theelease1..LorV `2J?,fthe-- .cmposite sides of whichconsist` of sa.

supporta!by@-suitablefrellenmeanavlflhisqterm. plurality :o fparalleI lstepsiwMid'these .form

isfemployed -to =designate baH rQllens, ort j thef 30 Witlieach. other apluralityofgrooves,one within-Y likei In-,thivsfinstancez lelliave,ernpleyedroller-v tbefiother, v`one groove:being-cut'substantiallyv meansftozperormisneiefmnctinssandfasce Sistinsfaof a plurality sof AVradiating;` rollers., t

located between; .thef dise4` shaped ,Jease;fp,ortignlY grooves of var-usvvidths aref adapted ,toV receive I I, of the support I I, and the lower ange-gneme: cuttingitoolsf, :1r-other .rnemberaoft.correspondber 1.2i.A The:rollers ,IA-fare-inserte endwise ing ,width,-.tliusproviding,narrow,groovesor seats portion M15, Awith only.- a--portion :10i-.-,-,tl1,e;,rollers .-Irllthe;drawings,` I have shown stops-Zat Loneextending. above:thebase,oontionasshownr in; endapt ythe fchannels 2l ,ofthe .toolreceiving and'. Eig. YEluesefrollersrumbaheldin@position 4o slmportine wed'ses, famiY 1 have shawnv these pins I5. The portions of` the rollersele,terjlldirrg wedges as secured in' position by set screvvs'i@V appveftheubase gportionfaregadanted to befseate whichl are screwablv mountedin'the upper` flange in radiating-grooves.I3aatlthe-.undQrSidefO I". lower flange member I 2a. Thefportignsso e Ydes.Lgnated247|,alsopositionedin.thefchannels hee memberflblfLhavevshownthe.cutting members,`

underside.,.ofethis-sange. in ernbr,` -betwenaibe 2I"but at the ,outer',nd's..thereof fandv with the:

radiating grooves 129 areadaptedlstoslde; @poni inner,.endscf`the ltool..abuttingthe` endsofthe the rollers, but .thisflange-memberqdropsover stops `".Phetools 24' vare similarlyQsecuredin tnezrollerswhen .thepgrooyes IIS areiopposite -theppstion, 4by. set l.screws A`25V ,alsoncarrielj byfand lattersclherebyflxing theltoblbder .LZ-circumf f extendinatliroughsthe.upperfiiange member.i212.v

.ferntially with respect, tothebase-orsunport ILI".k 'I lre-; st'.opsA ,ZZLandthe .cutting tool 24 may ,beef-Y Zlfhetqolholder-Iz .issecliredlwith,respectgto,the\ different crossfsecti'ons, Vvbut vboth ,mayV be seal-edf base joy,. a, 1ever Ier having .aii;ll.reaciec1;hubcmV securely-ibyreason bf the mu1ti-groovedfaces-.in. nut 1:65 which is screwed over the upper threadedfthe wedges 2'I. end ofthe column. III?. ...Betweenltheunperface Suchconstruction of-thet-ool `holdingV means,

of' the upperflarig'egI2@V jandlthealliub .orinut" [6&- 55 permits ,the .wedgefandithe stop to- .be-securedin-y is .located ,a collar .Il-harina.aredilcdehub which.. extendainto wanneer end olf ,a-csititlral. to; bore' I'Zinithespacer 1,29; horaria; ash-dgl;-

bel removed, jsliarpened,V and replaced lin the vided at theupner .side of the porti the tool' helder' around the column; 'rms'- e farms.a..,9r1in.driaal.recess .iQi-..a. cQi1.sprihg 158;' bcrinsbarmay be eiectively:locatedand nele:

anxeaggposition, .andpermirs `meeuaing mois .2.4

same position as Ybefore the. sharpening, .withderyllatiis. lower,endgLwliicrishszulderisere 0141.15#aslellt'adjustment@time.cutting.toliffl i p Myirooi homer is. sey distracted that' a man the'endsqwhich.engagethoshoulden llandjthe by one" of ithe, tool. supporting" AWedgesfzl `.It-.itis

theJever ISi-is unscrev've@t` thgsnrijngl. 65 my 'tool holder, a 00.0.11supportin'.e,Wedgev is reunderqmnressipn;raisesiahe '0.11. thailutil6%;Y.permittinglthetnolshclden. to. hea msiltionras indicated by 131 in Fia. 6.v .In order raisdlmheniit isdesiredtowotategtlfetoqllhp Wilirepectio .thejhaseOrgsupporta rherely'perf of'the -iower flange wwf the AAflangemember l2' nropellyitd .seat the :boring 'banjthe top orface` Y mitting'the` toolV invv the tool-holdertprbve shifted; 70 isprovided with an appropriate llocating recess'k Qimumferentially `.t0-,itsY desired ppsitien; |21.V As shown in1Fie..2, this mcatinerecess. isv tuglkliolienistlhnSllllin the desiredsliifted.. shownas t'rid'e` and in alignment with` a rocker pp illOn/.by SQreWlngL-fthaleven-JQ Vdown xonwtlie grnvej'Zh.. The boring bar may be held inpolsi lcglllmnflllbg- L Y i 1- tion by the set screws 23 and 25. v. Various cuttingV tools, indicated by thel letters 75V A boring bar, as well as certain othentools,

metrically opposite each other about the axisv of the tool holder I2, these adjusting screws extending through the tool holder preferably at and through the .corner portions of the squareA part I2c of the spacer I2, as shown best in Fig. 5.

The heads of the screws are short of the upper side of the upper ilange member, and the lower ends thereof are adapted to extend below the lower flange member and into conforming recesses I I e at the upper side of the base portion of the support II, as shown best in Figs. 5`and 6. It will be noted that the recesses I Ie are stag'- gered with respect to the radiating roller grooves II. When it is not desired to adjust the tool 3l vertically with respect to the base, the upper ends of the holes for the adjusting vscrews 4I are covered by means of the collar I'I; but when it is desired to adjust the screws 4I, the collar I'I` is rotated until holes or two diametrically opposed notches IIP at the periphery of the collar Il are brought into alignment with the screws 4I so that the latter may be readily adjusted. When it is intended to cover the upper .ends of the holes for the adjusting screws 4I, ythe collar is so shifted circumferentially that one of the notches I'Ib is located over a pin 42, thereby locking the collar against rotation. When it is desired to place the notches IIb opposite the screws 4I,

another notch I1c in the collar I1 permits the i latter to be lowered Aover the pin 42. When the tool holder is adjusted to the desired vertical position, it is secured in place by the lever I6.

The tool post normally rests directly on the flat top face of the saddle I of the lathe or other machine carriage, and is secured thereagainst by a single bolt, such as the T-bolt I3 shown in the drawings. I have .provided additional means to absorb the shifting or twisting tendency of the tool post. Such means consists of a pair of stops 5I having flat heads 5Ia and Shanks 5Ib. These are mounted in the disc shaped portions IIe of the support II and the overall length of the stops is preferably slightly less than the base Ile. The head portions 5Ia and the upper portions of the Shanks 5Ib are longitudinally split as indicated by 5Ic. The head portions of the stops thereby become expansible and frictionally secure the stops either in their downwardly shifted stop positions or in upwardly retracted positions. When shifted downwardly, the pro-- truding Shanks engage the upper sides of the T-slots Ia, as indicated in Figs. 1, 3, and 4. The pins or stops 5I may be retracted by manually forcing the same upwardly from below.

In Fig. 'I of the drawings, I have shown a tool holder having a triangular shape in plan. This particular shape permits greater clearance at both sides of the cutting or other tool so that it will not interfere with the work, to be operated on, on the lathe or other machine. This tool holder may .be used to provide access to portions o-f the work not permitted by the other structure described.

Though I have shown and described a particular construction, combination, and arrangement of parts and portions, and certain modifications thereof, I do not wish to be limited to the same but desire to include in the scope of my invention the construction, combination, and arrangement substantially as set forth in the appended claims.

I claim:

l. In a means of the class described, a support, a turntable mounted on said support and provided with a face adjacent the support, a pluralityeof positioning rollers located between the support and the turntable, .each .of the latter being provided'with circumferentially spaced radiating index notches for receiving the rollers,

screw means for securing the. turntable with respect to the support, and a spring for resiliently holding the turntable, rollers, and support in ensagement when the screw means is released to facilitate the raising'of the turntable rfrom one of the index notches to permit the turntable to ride on the rollers to the next circumferentially spaced index notch.

2. Ina means of the class described, a support, a turntable rotatably mounted on said support and provided with a face adjacent the support, said face being perpendicular to the rotating airis of thev turntable on the support, a positioning roller means between, the support and the turntable, said support having means for receiving the roller means therein, the face of the turntable being adapted to ride upon the roller means, and the face also being provided with a plurality of shallow recessesrfor receiving the roller imeans and permitting they turntable to drop thereover for locating the turntable circumferentially with respect to the support, means for raising the turntable free of the roller means and locking the turntable against rotation with respect to the support, and means for securing said turntable with respect to the support and against rotation of the former with the latter when the turntable rests on the roller means, and also for securing the turntable relative to the support when raised by the raising means.

3. In a means of the class described, a support having a bolt receiving slot, a tool post having a base adjustably mounted over the support, a bolt extending throughthe central portion of the tool post and through said slot for securing the tool post to the support, and stop pins mounted to slide vertically in the base and adapted to extend below the same to engage the opposite walls forming the slot, and adapted to be retracted into the base to permit free movement of the latter on the support.

4. In a tool holding means, a tool holder having spaced apart flanges, the face of one of the flanges adjacent the other iiange having a groove, a rocker tool-supporting wedge positioned in said groove and having a face adapted to be variously inclined to the face of said flange of the holder, the face of the Wedge having a longitudinal channel provided with corresponding steps at the opposite sides to form a plurality of grooves of various widths, one within the other, a stop adapted to be positioned in one of the grooves adjacent one end portion of the wedge, means on said other ange of the holder for securing the stop to one end portion of the wedge, and other means on said other iiange of the holder for securing a tool in one of said grooves of the wedge adjacent the opposite end portion of the face of the wedge and against said stop.

5. In a means of the class described, a support, a turntable rotatably mounted on said support and provided with a face adjacent the support, a plurality of rollers positioned between the support and the turntable for supporting the latter over the former, means for raising the turntable and locking the turntable against rotation with respect to the support, and means for securing said turntable with respect to the support and against rotation of the former with portrandrpmvidewithgaffae-fadiacentuthe supe,

port; :said-face beingnperpengicular:tofthef rgtatingfaxisfof fthe :turntahlezon the support a .12111- rapltyv gif rQllersbetween; Sthe ysupporti.: ami- -the turntable,;saidgsurgppntfhavingffmeansfr retaif ing the ro11ers.theren, Laportionrqf ,the rollers'v turntable being adapted tor rideliiprni.Agne..mllrs,A Y

table .Yagain'st rt'atinrwith e'spe to" the Asup"- En R1 OBERWEGNER l 25' 

